کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4712754 1638101 2015 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Well-balanced numerical modelling of non-uniform sediment transport in alluvial rivers
ترجمه فارسی عنوان
مدل سازی عددی به خوبی متعادل از انتقال رسوبات غیر رسمی در رودخانه های آبرفتی
کلمات کلیدی
حمل بار رسوب غیر رسمی، طرح متعادل کننده، توپوگرافی نامنظم، جریان ضعیف، مدل سازی رودخانه ریاضی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات ژئوشیمی و پترولوژی
چکیده انگلیسی

The last two decades have witnessed the development and application of well-balanced numerical models for shallow flows in natural rivers. However, until now there have been no such models for flows with non-uniform sediment transport. This paper presents a 1D well-balanced model to simulate flows and non-capacity transport of non-uniform sediment in alluvial rivers. The active layer formulation is adopted to resolve the change of bed sediment composition. In the framework of the finite volume Slope LImiter Centred (SLIC) scheme, a surface gradient method is incorporated to attain well-balanced solutions to the governing equations. The proposed model is tested against typical cases with irregular topography, including the refilling of dredged trenches, aggradation due to sediment overloading and flood flow due to landslide dam failure. The agreement between the computed results and measured data is encouraging. Compared to a non-well-balanced model, the well-balanced model features improved performance in reproducing stage, velocity and bed deformation. It should find general applications for non-uniform sediment transport modelling in alluvial rivers, especially in mountain areas where the bed topography is mostly irregular.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Sediment Research - Volume 30, Issue 2, June 2015, Pages 117–130
نویسندگان
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